Improved mosquito-screen



diluted Cstartergallant @Wina JOHN M. GRISWOLD, OF AUBURNDALE, MASSACHUSETTS. Laim Patent No. 92,441, dma July' '13, 1869.

IMPROVE!) MOSQUITO-SCREEN.

The Schedule referred to in these Letters P'atent and making part of the same.

To all to whom these presents shall come Be it known that I, JOHN M. GRrswoLD, of Auburndale, in the county of Middlesex, and Commonwealth of Massachusetts, have made an invention of a new and useful Mosqrn'to-Screen; and do hereby'declare the following to be a full, clear, and exact description thereof, due reference being had to the accompanying drawings, making lpart of this specification, and in which- Figure 1 isa vertical section, and

Figure 2, an outside elevation of a window-frame containing my invention.

Figure 3 is a vertical and longitudinal section, exhibiting the grooves or studs, to be hereinafter explained.

The object of the invention comprising the subjectmatter of this patent, is to produce a simple, economical, and effective screen to exclude mosquitoes and other insects from habitable dwellings or apartments,

and one which shall not interfere with the ordinary working of the wiudow-sashes or blinds, the device covered by my invention occupying no valuable space when in use, and when out of season is capable of being-packed .and stowed away in extremely small compass.

The invention consists in the adoption of two thin iiat rectangular frames, composed of wood or other suitable material, such frames being covered with a proper screen or gauze of woven-wire cloth, and disposed within the window-frame, and between its outer surface and the outermost sash, or between such sash and the blinds with which the window may 'at the time be supplied, the movements of such frames past one another in a vertical plane being guided by studs and grooves, the former of which are affixed to the opposite outer' edges of the frames, and the latter made within or applied to the outer guide of the windowsash, or the facings, as they arc termed by builders,

the whole being in manner and operating as hereinafter explained.

In carrying out my invention, I utilize the vertical strips or facings of the window-name, which form the outer sash; or, rather, I utilize the intervening space now occupied between the two opposite strips or facings, and compel them toy perform the oilice of guides to the vertical movements of the screen.

In the-drawings, to which allusion has before been made as accompanying this specification, A denotes a window-frame, of ordinary construction, and of which a is the upper bar, and b .the window-seat, the vertical strips of wood which divide the frame into spaces for receiving the sashes, being shown at c and cl', the latter being the outermost one. In carrying out my'invention, I affix to the inner or co xtiguous fac e or edge of each opposite strip cl, a thin strip, e, of equal or" less width than such strip or facing, and I fo1'1n,in the facev of such strip e, two upright alternated channels or grooves, ff, as represented.

g h, in the drawings, denote two -open thin rectangular frames, coveredwith gauzeor other suitable material, 'for preventing the passage of insects, the width of these frames being of such extent as to fill the -intervening area created by the presence of the facings el d, the aggregate height of the two frames beingequal tothe distance between the top bar a and the seat b of the window-frame, or in excess thereof to the extent of the lap of their contiguous bars; that is to say, eachfrarne is to fill one-half of the entire opening of the window-frame, the combined depth of the frames being preferably less than that of the facing with which they are connected.

The lower bar of each frame g or l1, is to-be provided with a bolt or other proper means of securely. holding it at any desired altitude.

The outer edge of each frame g or h is provided with two or .more studs, il c', which extend into the channels ff, the purpose of the guides and channels being to determine or insure theproper vertical movements of the frames.

1 The above description embodies the mechanical construction of the device constituting my present inven- It-will be evident to intelligent persons, that while such device serves, while occupying the entire area of the window-frame, to ei'ectually exclude the entrance of insects, it will not interfere with-the ordinary movement of the sashesand blinds. Y

It will also be apparent, that whennot wanted for use, the 'arnes g h may be stored away into very small compass.

The device is cheap, not liable to derangement, and easily and Iquickly applied and removed, and may be applied with equal advantage to door-ways or other apertures as to the windows.

Having thus described the nature of my invention, as well as its construction and operation,

What I believe to be novel and original with myself, as well as useful to the public, and desire to secure by Letters Patent, is as follows: 'y

I claim, as an improvedl insect-screen or guard, the device above described, consistingof the two frames g h, covered with a suitable netting,`when the same are provided with the studs i' l, and combined with the channels fj', made within the facings l tl, or independent strips secured thereto, the arrangement and operation of the whole being as before explained.

JOHN M. GRISWOLD.

Witnesses:

EDWARD GRIFFITH, E. H. Hams. 

